Mechanism for manufacture of tubular paper structures



March 19, [1940.

D. c. SPAULDI NG. JR 2,194,435 MECHANISM FOR MANUFACTURE OF TUBULAR PAPER STRUCTURES Filed July 1, 1937 U j INV;NT(YDRJJ 5 1701/16 6. @0'01/ dizzy 4' 572,5. 0-

Patented Mar. l9, 1940 UNITED stares it? A 55.

David C. Spaulding, in, Cleveland, Ohio, assignor to The Standard Oil Company, Cleveland, Ohio,

a corporation of Ohio Application July 1, 1937, Serial him-151,419

Claims.

In the manufacture of tubular structures from v paper or the like, in connection with, or rather just after the wall of the structure has been built up, it is generally desirable to treat the exterior is surface for finishing or water proofing or otherwise rendering it more resistant than the normal cellulosicsurface. Particularly where a rapid through-put of articles is important, it is desirable that each operation be accomplished with such speed and correlation with the other operations as to not retard the general rate of throughput. In accordance with the present invention, mechanism is now provided, which makes possi-- ble such treatment of the exterior of structures on the order noted, with very effective results and particular operating convenience.

To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described, and particu larly pointed out in the claims, the following description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.

In said annexed drawing:

Fig. 1, together with its portion out on account of space limitation, is a side elevational view showing structure embodying the invention; Fig. 2 is a fragmentary plan view of the right end thereof, on enlarged scale; and Fig. 3 is a transverse section taken on a plane substantially indicated by line III-III, Fig. .1.

Referring more particularly to the drawing, there is shown a framing f, with a forming and forwarding mandrel 2, driven rotarily intermittently, in brief periods of rotation during which the tube is wound up and formed by the formin mechanism F, the details of which may be of any usual or preferred character and need not be particularized here, and driven by driving means which may include a drive motor m and intermittently operating gearing g, the precise detail of which may be of any desired or preferred charj acter. In association with the mandrel is a forwarding collar or ejector 4 which is reciprocable axially of the mandrel, and in relation with the rotation periods thereof is driven to move axially of the mandrel in excursion of a length sufficient to push the formed tube immediately in front of it a step forward on the mandrel, and being then returned to its initial position leaving the mandrel clear for winding up another tube. The operating means for the ejector may for instance 55 include a cam III, on a counter-shaft II, for actu- Fig. 10 broken (o1. sir-a7) ating a lever l2 pivoted above to the framing-and connected by a link iii to a lever l4 pivoted below to the framing, and the lever l4 connects through a link to a slide it which carries the ejector. In association further with the mandrel, beyond 5 such zone of formation of the tubes, the finishing mechanism whose detail is more particularly here concerned, is positioned such as to in turn operate on the forward tube. The shaft I8 extending along a lower level than the mandrel 2, for con 10. venience, is driven in connection with the general gearing g, and it is correlated. with the drive of the mandrel. On the shaft is a cam is having a peripheral rise, and extending from a point of pivot-mounting on framing opposite said cam is- 15 a fork 20 which carries on the side of its upper limb a roller 2 l; and on the side of its lower limb there is a roller 35 to contact with the cam, whereby the fork is oscillatively lowered each time the cam is rotated by the shaft it, the fork- 20 being urged upwardly especially by resilient means, as for instance a spring 22' extending to a fixed pointon the framing. Eitending upwardly from the fork 2c is a link 23, and this is connected by a short arm 26 to a rock shaft 25. Oscil 2 lating with the movements of the rock shaft is an arm 2% which carries a liquid applicator, preferably in the form of a flattened brush 2?, the mounting being such as to bring the latter into contact tangentially against the surface of the an rotating article on the mandrel, and the direction of rotation being away from the position of the brushJ. By reason of the oscillative movement of the brush as determined by the rock shaft and cam-operated link 23, the lower position of the 35 brush provides for dipping into liquid in the receptacle 3U therebelow. If a heating means, as for instance heating pipes 3i supplied by steam,

be included the temperature of the receptacle 30 may be maintained for a liquid condition in ma- 4o terial of melting point such that having been applied and distributed over the surface of the tubular article being operated upon, the cooling on exposure rapidly sets the liquid. Among substances which may thus be applied, are wax com- 5 positions, etc., which may be of a character to impart more or less polish if desired, or other character of color or finish or surface effect. Carried also on the shaft 88, but not fixed there to, alongside the cam i9, is a thin cam 33, and projecting out therefrom is an operating handle or hand lever 34, capable of rocking the cam 33 into position to engage ,or disengage with the roller 35 on the lower limb of the fork in, the roller being of suiiicient length to cooperate with both cams. When the hand lever 34 is in its lowermost position, the cam 33 is disengaged from the fork, and the latter is correspondingly free to be operated normally by the spring 22 and cam means l9 as driven by the shaft. When however, the hand lever 34 is raised into its upper position, its cam 33 engages the roller 35 of the fork and holds it down, and irrespective of rotation of the cam I9, the applicator 21 is held in a depressed position away from contact with the tubular structure on the mandrel.

The operation of the apparatus will be clear from the foregoing. A tube having been formed at the forming station, as need not be'detailed, and being then ready for the further treatment, the forming collar 4 is slid on the mandrel to the right, as viewed in Fig. 1, by the action of the cam ID on the cam lever I2, throwing the lever l4, through the connection link l3, and correspondingly pushing the support-slide l6 carrying the forwarding collar 4. The cam l0 then returns the collar 4, and the tube which was forwarded by it is left in position opposite the brush 21. Thereupon, the cam l9, through the intermediary of the upper arm of the fork 20 and the arm 23 actuating the rock shaft 25, raises the brush 21 from the liquid in the pan 30 into contact with the surface of the tube on the mandrel, and the tube being rapidly rotated receives a smooth application of the finishing liquid. The cam I9 then returns the brush down into the liquid in the pan. The forwarding collar 4 again reciprocates toward the right, as viewed in Fig. 1, and thereby forwards a newly formed tube, pushing the now-treated tube ahead of it, and in succession a series of tubes are treated and pushed along by stages to discharge from the mandrel. When for any reason it is desired to interrupt the application of the liquid by the brush 21, the operator may swing the hand lever 34 into its upper position, thereby forcing its cam 33 against the roller 35 of the lower arm of the fork, and thus pulling the arm 23 and the brush 21 down into lower position.

Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be. employed.

I therefore particularly point out and distinct ly claim as my invention:

1. In apparatus of the character described having a rotatable mandrel, a forwarding collar reciprocable along said mandrel, means for actuating said collar including a slide carrying said collar, a. cam timed in relation with the mandrel,

an arm cooperating with said cam, a link, another arm connected to said link and to said slide, whereby a tube may be forwarded a length along the mandrel, a pan under the mandrel, means for heating the pan, a brush to be reciprocated between the pan and tangential contact with the tube on the mandrel, a rock shaft carrying said brush, a lever arm and a link for operating said rock shaft, a cam turning in timed relation with said mandrel, a fork having an arm actuated by said cam and associated with said last-mentioned link, and another cam with a hand lever for optionally depressing said fork and thereby withholding the brush.

2. In apparatus of the character described having a rotatable mandrel, means for forwarding tubes along said mandrel, a pan under the mandrel, means' for heating the pan, a brush to be reciprocated between the pan and tangential contact with the tube on the mandrel, a rock shaft carrying said brush, a lever arm and a link for operating said rockshaft, a cam turning in timed relation with said mandrel, a fork having an arm actuated by said cam and associated with said last-mentioned link, and another cam with a hand lever for optionally depressing said fork and thereby withholding the brush.

3. In apparatus of the character described having a rotatable mandrel, means for forwarding tubes along said mandrel, a pan under' the mandrel, a brush to be reciprocated between the pan and tangential contact with the tube on the mandrel, a rock shaft carrying said brush, a lever arm and a link for operating said rock shaft, a cam turning in timed relation with said mandrel, a fork having an arm actuated by said cam and associated with said last-mentioned link, and another cam with a hand lever for optionally depressing said fork and thereby withholding the brush.

4. In apparatus of the character described having a rotatable mandrel, means for forwarding tubes along said mandrel, a liquid supply, a

brush to be reciprocated'between said liquid supply and tangential contact with the tube on the mandrel, a cam turning in timed relation with said mandrel for reciprocating said brush, and means for optionally depressing said brush.

5. In apparatus of the character described having a rotatable mandrel, means for forwarding tubes along said mandrel, a liquid supply, an applicator to be reciprocated between the liquid supply and contact with the tube on the mandrel, ahd a cam turning in timed relation with said mandrel for operating said applicator.

DAVID C. SPAULDING, JR. 

